DE401572C - Electrical security system for displaying the unauthorized opening of rooms u. like - Google Patents

Description

To prevent unauthorized persons from entering unsupervised rooms or at least at least to indicate, one uses, as is well known, electrical alarm fuses. These occur, for example, when opening the secured doors, windows or the like, in the event of injuries or other interruptions, etc. in activity. However, precautions must be taken that not every open or the like.

causes an alarm and a false alarm is absolutely avoided, and that an attempted Theft or break-in is only reported in the event of danger, d. H. so only during the time when the to the securing room or object is unsupervised.

This is the purpose of the invention. An electrical alarm device, for example a so-called three-wire system, ie idle and working current with a common neutral return conductor, is created in a known manner in such a way that in the event of danger again in a known manner by separating the closed circuit or closing the working circuit and by means of built-in relays or the like The alarm devices are set in motion by closing one or more alarm circuits through a relay part, e.g. B. flap, armature, trap, contact needle o. The like. Ale relays can serve minimum, maximum, differential, isolating, moving coil relays or similar devices. In such relays, it is advantageous to use the arrangement for continuous reporting until shutdown, which is known in many ways, in an expedient manner.

The innovation is now, according to the inventive idea, that to avoid a false alarm, the part of the relay that closes the alarm circuit in the event of danger or the like, e.g. B. trap, flap, anchor, contact needle 0. The like., By an appropriate Retention, e.g. B. locking, latch, friction or the like, held in its locked position and thereby prevented from bridging or connecting the alarm circuit in such a way that only after the detention has been lifted, d. H. after

Release of the part controlling the alarm circuit, this the alarm circuit resp. -close circuits and thereby the alarm devices located in them in a known manner Can set gear.

In order to keep the power consumption as low as possible, it is advantageous to switch on of the line or lines only when the security system is used. It is advisable to switch on shortly before the above-described release of the alarm circuit in the event of danger The closing part of the relay is done in such a way that the circuit is switched on or the circles and the release of the initially blocked relay part by means of one and the same device, e.g. B. by turning a hand lever, switch, attaching a key or the like.

The other facilities of the alarm device, e.g. B. the number and type of installation the line or lines, the contacts or the like, the relay types or the like, the alarm signals, etc., are irrelevant for the invention, they can be known in Way can be carried out in many different arrangements and types.

The drawing shows schematically an embodiment:

Fig. Ι shows what is known as a three-wire line 1, 2, 3 composed of working current 1 and closed-circuit current 2 with a neutral return line 3 and current source 4. In the example z. B. by opening a door, a window or otherwise by the working current contact 5, the working current line is closed, at the same time the closed circuit at * closed-circuit danger contact 6 is open. In the closed working circuit 1, the armature 7 is attracted by the excitation of the electromagnet 8 and the contact 23 in the quiescent current line 2 is opened, d. H. the closed circuit is interrupted. Another interruption of the quiescent current 2 is at the same time due to the above-mentioned separation of the quiescent current line 2 at 6 24 fall. The contact devices connected to the armature 24, e.g. B. springs or the like 11 and 12 close the alarm circuit 22 at 15 and 16 and set the alarm device, e.g. B. Noise, light o. The like. Apparatus 20 and 2-1 in progress.

In order to limit the power consumption as much as possible, it is advantageous to switch on the line only · if the alarm device is used. For example Therefore, a switch 14 of the neutral line 3 becomes through the manual switch 17 closed shortly before the armature 24 is also activated by the hand lever 17 at point 19 is unlocked.

Fig. 2 shows schematically an example of a built in a simplified system and designed according to the inventive concept relay 34 for quiescent current. A false alarm is excluded because the armature 27, the alarm line 26 by means of the armature contact springs 28 and 29 cannot close because of the action of the locking at 32 by the hand lever 33.

If the closed circuit 25 is not switched on in order to save power, would be at Unlocking at 32 closes the alarm circuit 26 at 30 and 31 happen immediately. In order to prevent this, it is only shortly before the cancellation the locking of the armature 27 taking place at 32, likewise by the rotation of the Lever 33, the closed circuit 25 closed at 35 and thereby the closure of the Alarm circuit 26 prepared by the now energized electromagnet 34 in a known Way in case of danger as a result of the somehow interruption of the quiescent current 25 his armature 27 drops and the circuit 26 for the alarm signals by means of the Closing members 28, 30, 29, 31 turns on.

Claims (1)

P ATENT claim: Electrical security system to indicate the unauthorized opening of rooms and the like., characterized in that created in a manner known per se electrical system, one or more relays or the like of .such a device lie that the part that closes the alarm circuit or the alarm circuits in the event of danger (e.g. trap, Flap, anchor, contact needle or the like.) By a determination, z. B. latch, latch, friction or the like, in his Locked position is held in such a way that it can only use this position after The use of the security system resulted in the lifting of the feet and in a manner known per se, the closing of the alarm circuit and thus the activation of the ones contained therein Can cause alarm signaling apparatus. 1 sheet of drawings.